21440476741641 has 4 divisors (see below), whose sum is σ = 28587302322192. Its totient is φ = 14293651161092.

The previous prime is 21440476741639. The next prime is 21440476741667. The reversal of 21440476741641 is 14614767404412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21440476741641 - 2¹ = 21440476741639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21440476741241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3573412790271 + ... + 3573412790276.

It is an arithmetic number, because the mean of its divisors is an integer number (7146825580548).

Almost surely, 2^{21440476741641} is an apocalyptic number.

It is an amenable number.

21440476741641 is a deficient number, since it is larger than the sum of its proper divisors (7146825580551).

21440476741641 is an equidigital number, since it uses as much as digits as its factorization.

21440476741641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7146825580550.

The product of its (nonzero) digits is 3612672, while the sum is 51.

The spelling of 21440476741641 in words is "twenty-one trillion, four hundred forty billion, four hundred seventy-six million, seven hundred forty-one thousand, six hundred forty-one".